Improvement in adjustable organ-treadles



J'. S. ROBINSON.

ADJUSTABLE ORGANTREADLE. l No.177.962. Y Ja/aentecl May 30,1876.

' zvezziogzw James S. Rahman.

Assocl@ A mwfneg.

TUNITEE- STATES PATENT OFFICE.

JAMES S. ROBIN SON OF NORTH EAST, PENNSYLVANIA.

IMPROVEMENT IN ADJUSTABLE ORGAN-TREADLES.

Speciheaton forming part of Letters Patent No. 177,962., dated May 30, 1876 application liled November l2, 1675.

Aa part of this specilication.

The nature of my invention consists in providing an organ, melodeon, or other instrument with a treadle so constructed that the same can be as easily operated by a person of low as one of high stature.

My invention may be vdivided into two parts: iirst, the mode of adjusting the treadles to various heights; second, the mode of adjust- 4ing the treadle to the webbing or cord which connects it with the exhaust or bellows.

My invention is represented in the accompanying drawing as follows: Figure 1 is a section View, taken lengthwise of the treadle and crosswise of the instrument, and shows the first part of my invention entire, and the mode of accomplishing the second part.

The following is a full description of my devices: A is the base-board ofthe instrument, and A isthe projection of the baseboard, usually lmade at the place where the treadles attach. O is a part of the front board of the case. B represents the exhaust or bellows.

As before stated, the first part of my invention relates to the mode of adjusting the treadles to various heights, and may he described as follows The treadles are represented by the letter a. These-are hung at the heel by a hinge, e, to a frame, b, which is hung to the base-board A by a hinge, e', at its inner edge or toe. At its outer edge or heel is attached, by a pin, asustaining-bar,

c, which is notched or ratcheted, and engages with a pin, h, in the front board O. There are two of these bars c, one at each end of the frame-that is, at each side of the treadles.

` its outer side or heel,and the sustaining-bar c slides upon the pin h., and, the ratchets becoming engaged, the treadles are sustained at the proper point of elevation.

lt will be seen from the above description, obvious to any one skilled in the art to'which this invention relates, that any degree of elevation can be had7 this'being entirely regu-v lated by the llength of the ratchets in the bar c.

I do not wish to be confined to the particular form and mode of ratchetng the sustaining-bars c herein shown, for it is obvious that many equivalent modes may be devised.

When the treadles are made adjustable it becomes necessary to have the treadle port, or opening through which the treadles work, also adjustable, or else when the ,treadles are low down the opening is too great, and exposes the inside of the case too much to view 5 or else when the treadles are high up there will not be room for the feet. To obviate this I use a curtain-board, d, whichis attached to the two sustaining-bars c, at the proper height above the treadle, by a pivot-pin, and its upper edge slips into an opening behind the front board C, and is kept in position there by a guide, g. Now, when the treadles are raised the curtain-board is also carried up by the sustaining-strips c, as shown by dotted lines.

When treadles are made adjustable it is necessary to provide a means of so attaching the treadles to the webbing that there will be no slack 7-that is, to so attach them that they will operate upon the webbing as perfectly at one point as another. This is provided for in the second part of my invention, as clearly shown in Fig. l. The webbing is represented by E. It is attached to the heel of the frame b, and then passes through a loop, f, in the board A thence -under the frame b toward the back of the instrument, where it passes through another loop,f,thence up to the top of the exhaust B, Where it passes through another loop,f, thence toa point on the iront board O above the treadles, where it passes through another loop,f, and thence down to the toe of the treadle c, where it is attached. Now, by observing the dotted lines it will be seen that the pull 7 upon the Webbingis the same no matter at what point the treadles may act.

What I Wish to claim as new, and secure by Letters Patent, is as follows:

1. The treadle a, secured byhinge'toaframe or platforin,b, hinged at its opposite or rearside to the case A, in combination with a ratcheted sustaining-bar, c, substantially as described.

2. In combination with the subject-matter. of the preceding` clause of claim, the webbing E, attached to the heel of the framcb, bellows B, toe of the treadle a, by means of loops and pulleys f f f f one of Which latter is secured n to said bellows, substantially as set forth.

3. The front of an organ case providedwith 1 a pedal-port and they sliding curtain board,4 d,

all constructed andatrangcd to operate sub 1 ly as described.

In testimony that I claim the foregoing as `my, o Wn I affix my signaturein presence of tWO witnesses.

JAMES S. ROBINSON. Witnesses:

JAGOB'F. W-ALTHER',

JN0. K. HALLOCK. 

